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4010 weep hole leaking oil -help!

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Rob

02-21-2003 08:06:45




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Everyone-
I posted a message earlier in regards to weep hole leaking oil on a 4010LP. I am slightly confused. Everyone says that the weep hole was designed to detect an antifreeze leak. I have checked my oil repeatedly and there are no signs yet from a coolant leak into the crankcase. Do the cylinder liners seal off both coolant from the block on the top o-ring as well as oil from the crankcase on the bottom o-ring? It was mentioned to put diesel in the radiator to "soften" the o-rings but I am not leaking coolant I am dribbling a few drops of oil occassinally. Also I am using a 15w-40 oil- would this problem slow down by going back to a straight 30W? It seems like this problem has worstened with a multi-viscosity oil. These weep hole leaks apparently were a common problem on 4010s. I would appreciate any comments and advice. Thanks

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John A

02-21-2003 12:28:18




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 Re: 4010 weep hole leaking oil -help! in reply to Rob, 02-21-2003 08:06:45  
Another option (or opinion). If you are using this tractor occasionally or just on light loads and are willing to put up with the annoyance of the leak, just run it. Watch the oil closely because the others are correct in saying that if both o-rings fail, you will end up with antifreeze in the oil. That is a quick way to ruin a crankshaft. My point is that the weep holes are there for a reason, and a little oil showing there does not mean you MUST overhaul RIGHT NOW. On the other hand, if you depend on the tractor and need it to be there when you need it, schedule the overhaul now, so it doesn't crater when there is work to be done.

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G-MAN

02-21-2003 10:47:03




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 Re: 4010 weep hole leaking oil -help! in reply to Rob, 02-21-2003 08:06:45  
There are two o-rings in the liner bore. The hole is drilled into a passage between them, and allows coolant getting past the top o-ring to escape to the outside of the block, rather than be forced past the bottom o-ring and into the crankcase. Since the cooling system is pressurized, that's what would happen if the hole weren't there. You mention that there is oil coming out. That is a clear indication that your bottom o-rings are completely shot, as there is no pressure in the crankcase, and the oil is simply getting thrown up past the o-ring by the crank slinging it. If your upper o-rings were to start leaking, you would get an oil pan full of coolant very quickly, because the bottom o-ring wouldn't stop it and it wouldn't be able to leak out of the weep hole fast enough. Bottom line - your engine needs to be disassembled to have the o-rings replaced at the very least, and will likely need to be overhauled. Check compression during the disassembly process to determine the condition of the liners and pistons. Simply looking at them won't tell you if they're still maintaining a good ring seal. My advice would be to bite the bullet and spring for a good in-frame overhaul, including new sleeves and pistons, bearings and a good valve job on the head. There are cheaper fixes, but that's exactly what they are - cheap fixes.

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Jon from Indiana --mistake

02-21-2003 10:36:56




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 Re: 4010 weep hole leaking oil -help! in reply to Rob, 02-21-2003 08:06:45  
My father bought a 4010 diesel new in 1963. In 65 in developed the o ring leaks, The dealer instsalled spacers under the lip of the cylinder liners to hold them up a little so the head would hold them down better so they couldnt move and cause either water coming down or oil coming up. This was a factory advised fix not made up by dealer. The 4020 was built different and didnt have this problem. Hope this helps. Jon

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Gpower

02-21-2003 09:46:23




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 Re: 4010 weep hole leaking oil -help! in reply to Rob, 02-21-2003 08:06:45  
You need to replace the orings around the liners inside if you are going to stop the leak. You are not in serious trouble yet, but eventually the orings are going to get worse and you will then have coolant getting into the oil. Most likely the liner wall and the oring grooves are cavitated, (small holes in the liners) this is common on these tractors and usually require replacing the liners. Be a good time to spec out all the bearings, crankshaft and pistons, as you will have all this tore down. You do not have to split the tractor or pull the block to do this. You can do a "In Frame" overhaul, just pull the oil pan, the head off, pull the liners and replace, also you can install new main bearings and rod bearings without pulling the crankshaft, providing that the crank is in good shape, which they usually are. Good Luck
Gpower

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Ralph in WI

02-21-2003 09:28:02




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 Re: 4010 weep hole leaking oil -help! in reply to Rob, 02-21-2003 08:06:45  
My parts book for the 3010 shows two O-rings at the bottom of the sleeve. Copper shims are also listed but not illustrated. There were a multitude (7?) of different casting numbers for the 3010 blocks. I am guessing the weap hole is located between the two O-rings and there might be either oil or antifreeze (or in the worst case both) leaking from a particular weep hole. I presume the design was to prevent fouling of both the crankcase and cooling system in case of an O-ring failure.

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